A Comparative Assessment of Mid-Water Trawl and Deep Vision for Investigating Fishery Resources in the Coastal Waters off Jeju Island, Korea

Round 1

Reviewer 1 Report

Overall comment

As the title of the manuscript (i.e. “A comparative assessment of mid-water trawl and Deep Vision for investigating fishery resources in the coastal waters off Jeju 3 Island, Korea”) declared by Yong-Deuk Lee, Hyungbeen Lee, Euna Yoon, Cheol Park, Eirik Svoren Osborg, and Kristoffer Løvall studied a fishery resources in the Jeju Island based on Deep Vision stereo camera system.  I have found this manuscript is very interesting and is written well and described comprehensively.  However, there 
are
 some major and minor comments 
which I hope will help improving the manuscript before 
it 
can 
be
published 
at the journal.  Comments are listed below.

Major comments

• Authors relatively well describe importance of Deep Vision stereo camera system and purpose of the study in the introduction part. However, importance of studies is just listed without any point and purpose of the study is not clear.  I, therefore, suggest you reorganize importance of the studies thematically and provide more clear and detailed objectives in accordance with sequence of results and discussion.
• I would like to see a comparison of biomass (kg or g) between trawl and Deep Vision data.  As I know, biomass information is very important to manage fishery resources.  Therefore, I suggest you convert length of identified fish to biomass of identified fish using Weight-Length Relationships (please see the www.fishbase.org)

Minor comments

1. Line 19-20: please define ‘haul01’, ‘haul02’ and ‘haul03’ in abstract 
2. Line 137: please provide detailed information of R program
3. Line 224: (629), (800) --> (n=629), (n=800)

Please check the journal format, specifically, about reference style.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments for author File: Comments.docx

Author Response

Please see the attachment.

Author Response File: Author Response.pdf